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The missing or altered X chromosome of Turner syndrome causes errors during fetal development and other developmental problems after birth â short stature, ovarian failure and learning disabilities. Physical characteristics and health complications that arise from the chromosomal error vary greatly.
Turner syndrome happens when a female is missing certain genes that are normally on the X chromosome. (Females have two X chromosomes. Males have an X and a Y). Some girls with Turner are actually missing a whole copy of the X chromosome. For others, just part of one containing the particular set of genes is missing. Research has found that almost 99% of babies missing the chromosome are miscarried. But about 1% of the time, these babies are born, and they have the syndrome.